Andy Hung 035d4ec772 VolumeShaper: Initial implementation
The VolumeShaper is used to apply a volume
envelope to an AudioTrack or a MediaPlayer.

Test: CTS
Bug: 30920125
Bug: 31015569
Change-Id: If8b4bed29760aa3bd15a4b54cae60e40b4f518ee
2017-02-10 18:08:12 -08:00
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